historian david more and less on his biography of barack obama followed by more on president obama with edward kline who wrote the amateur about the president's life and career before the white house. later, the white house videographer for the first two years of the obama presidency. >> so we put the missiles in cuba, the united states discovers that with our surveillance flights over there and tension builds and we have a quarantine or blockade around cuba and one thing that happened in that time is a soviet submarine is found by american ships and they start to drop missile charges, depth charges on soviet submarines, knocked out the electrical system, carbon dioxide was rising. people were passing out inside the submarine. they had no communication with the kremlin. the commander of the submarine says load the torpedo, let's attack, the war probably started already, we are not going to be doing somersaults down here when the war is starting. we will not disgrace our country. launch a nuclear torpedo. they set it ready to launch. fortunately one of the other commanders on the ship who had a